Portable steam engine and boiler



(No Model.)

S. E. JARVIS.

PORTABLE STEAM ENGINE AND BOILER.

No. 267,792. Patented Nov. 21, 1882.

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UNITED STATES PATENT OFFICE.

SAMUEL EJJARVIS, OF LANSING, MICHIGAN.

PORTABLE STEAM ENGINE AND BOILER.

SPECIFICATION forming part of Letters Patent No. 267,792, dated November 21, 1882. Applicationfiled August10,1882. (No model.)

To all whom it may concern:

Be it known that I, SAMUEL E. JARVIS, of Lansing, in the county of Ingharn and State of Michigan, have invented new and useful Improvements in Portable Steam Boilers and Engines and I dohereby declare that the follo win g is afull, clear, and exact description thereof, reference being bad to the accompanying drawin gs, which form a part of this specification.

The nature of this invention relates to certain new and useful improvements in the construction of that class of steam engines and boilers known as portable and the invention consists in the peculiar construction of parts and their various combinations, as more fully hereinafter described.

The objects of this invention are, first, to so construct the boiler that it can be easily flushed and thoroughly cleaned; second, to so set the boiler by means of proper appliances that the fire-box will be entirely surrounded by water; third, to provide a steam space and dome of a novel construction; fourth, to provide means for easily attaching and removing the engine, so that the two may be more readily transported and handled.

Figure 1 is a perspective view of my improved portable engine and boiler set up and ready for use. Fig. 2 is a vertical longitudinal central section through the boiler.

In the accompanying drawings, which form a part of this specification, A represents the timbers upon which the whole rests. Upon these timbers the iron cross-girts B are secured. These girts project upon one side of the boiler to form the bed plates or supports for the engine-frame C, which carries the cylinder and working-parts of said engine. The projecting parts of these girts are shown at a, and the engine-frame is secured to them by bolts b, one near each corner of the frame, so that for the purposes of transportation the engine may be readily detached by removing said bolts.

D represents the boiler, which is of tubular form and provided witha tubular fire-box, E, from which the flues lead to the smoke-jacket in the usual Way. Secured by riveting to the bottom of the boiler are the saddles F and Gr, the former being shorter than the latter in order to give the boiler an inclination to the front by elevating the rear end thereof by the the higher saddle, which is placed under the rear endof the boiler, as shown. By this peculiarity of setting, when the boiler contains the proper amount of water the tire-box is entirely surrounded by the water, and a steamspace is left at the rear end of the boiler above the water-line. The steam-dome G is secured on top of the boiler near the rear end thereof, and" a perforated T-shaped pipe leads from the steam-space up into the dome and conducts the steam into said dome, from which it is taken out for use through the pipe H. In order to allowany water of condensation that may collect in said dome to escape back into the boiler, the latterjs perforated within the dome and around the pipe leading into thesame. a man-hole, a, covered by the smoke-jacket J, and in the bottom of the boiler, and at its front end, is another man-hole, b. The position of the boiler compels all sediment to settle near this latter-described man-hole, whence such sediment can easily be withdrawn, and. it it is desired to flushout the boiler it can readily be done by water admitted at the rear manhole, allowing it to escape freely through the front one. The sheets forming the front of the boiler are cut out to allow the fire-box to be inserted, and the cut edges are bent outwardly to form an annular tinge, c, which is riveted to the wall of the fire-box, so that the latter, which is not built into the boiler in the usual way, can be readily removed for repairs, when necessary, by simply cutting off and removing the securingrivets and disengaging the lines. the usual feed and draft doors, and cast with a flange adapted to engage with the projecting flange to which the fire-box is secured. The engine is of the usual construction; and L is a support for the pillow-block of the main shaft K, which passes beneath the boiler and carries the fly-wheel or driving-pulley on the opposite side of the boiler to that shown in the drawings. This support L is removably secured to the timber or to the end of the front girt.

I find it very objectionable to bolt the carry ing saddles to the boiler, onaccou nt of. the difficulty of preventing leaking at thatpointyso I At the rear end of the boiler there is 1 I is the fire-front, provided with. I

rivet them fast before shipping from the shops. When a large boiler and engine are required of a portablecharacter, larger than ordinarily constructed, on account of the difiicnlties in shipping, especially where transportation must be by means of wagons and teams, my construction will be found very valuable, because of the ease with which the engine can be detached, so as to divide into two loads, and to set up the whole only requires that the timbers be leveled and the boiler placed'upon them, when the engine will be found in perfect working order, requiring no skilled labor to put it up.

I attach importance to the fire-box being removable, and when in position being entirely surrounded by water, in its relation 'to the fines and boiler, and its manner of being secured in place to the flange 0.

What 1 claim as my invention, and desire to secure by Letters Patent, is-

1. In a portable steam-boiler having rigid supports of different heights and a steam dome sA UELE. JARVIS.

Witnesses:

CHARLES F. HAMMOND, GEORGE B. RICHMOND. 

